Vehicle-mounted concrete pump

Abstract

The invention relates to a vehicle-mounted concrete pump (1) having at least one electric traction drive (2), at least one energy store (3) which is designed to supply the traction drive (2) with electrical energy in order to drive the vehicle-mounted concrete pump (1), at least one delivery pump (4) for delivering concrete, at least one electric pump drive (5) which is designed to drive the delivery pump (4), at least one additional working device (6), at least one additional electric drive (7) which differs from the electric pump drive (5) and is designed to drive the additional working device (6), wherein the vehicle-mounted concrete pump (1) is designed, in a pump operating mode, to draw electrical energy (E) via at least one mains connection (8) of the vehicle-mounted pump (1) in order to supply the electric pump drive (5) with said electrical energy, wherein the vehicle-mounted concrete pump (1) is further designed, in the pump operating mode, to supply the additional electric drive (7) at least partially or completely with electrical energy (E) from the energy store (3).

Description

[0001] Autobetonoumoe

[0002] The invention relates to a truck-mounted concrete pump with at least one electric drive, at least one energy storage device configured to supply the drive for driving the truck-mounted concrete pump with electrical energy, at least one delivery pump for conveying concrete, at least one electric pump drive configured to drive the delivery pump, at least one additional working device, at least one additional electric drive different from the electric pump drive configured to drive the additional working device, wherein the truck-mounted concrete pump is configured to draw electrical energy in a pumping mode via at least one mains connection of the truck-mounted concrete pump in order to supply the electric pump drive.

[0003] Such a truck-mounted concrete pump is known from CN 109057347 A. This is a fully electrically driven truck-mounted concrete pump. The pump drive and auxiliary drives can be supplied with electrical energy either from the energy storage system and / or the grid connection. Individual consumers are not assigned to a specific energy source. During concrete pumping, numerous components of a truck-mounted concrete pump require a significant amount of drive energy. The energy storage system for supplying the electric drive of a fully electric truck-mounted concrete pump is currently insufficient for extended concrete pumping operations. The currently available energy storage capacities are also insufficient to achieve comparable pumping performance and delivery rates to a conventionally diesel-powered truck-mounted concrete pump.Therefore, for a purely electric drive of the truck-mounted concrete pump, the pumping capacity and flow rate must be reduced or throttled compared to diesel-powered truck-mounted concrete pumps. The power connections available on construction sites also generally do not supply enough electrical energy to drive the feed pump and auxiliary drives of a truck-mounted concrete pump with the same sufficient power as a diesel engine.

[0004] It is therefore an object of the invention to provide an improved fully electric truck-mounted concrete pump that enables a pumping performance and delivery rate comparable to diesel-powered truck-mounted concrete pumps and has a particularly simple design for supplying electrical energy.

[0005] This problem is solved by a truck-mounted concrete pump with the features of claim 1.

[0006] Because the truck-mounted concrete pump is further configured to supply the auxiliary electric drive, at least partially or completely, with electrical energy from the energy storage system during pumping mode, a delivery rate and flow rate comparable to diesel-powered truck-mounted concrete pumps can be achieved, while maintaining a simple electrical power supply setup. For driving the truck-mounted concrete pump in pumping mode, both the pump's energy storage system and the construction site's mains power connection are used simultaneously. In pumping mode, the pump drive that powers the delivery pump is supplied directly with electrical energy from the construction site's mains power connection. Pumping mode specifically means that the maximum electrical energy available from the mains power connection is used to drive the delivery pump. The auxiliary drives, e.g.,The energy storage system powers the charging pump for the pipe diverter or the agitator of the truck-mounted concrete pump. In a separate operating mode (different from pumping mode), the energy storage system powers the electric drive of the truck-mounted concrete pump. Because the energy storage system powers at least some auxiliary drives in pumping mode, the entire power supply from the grid connection is preferentially available for driving the delivery pump. This allows the available electrical energy sources for the truck-mounted concrete pump—the energy storage system and the grid connection on the construction site—to be used effectively in combination to electrically drive the pump. It can be assumed that in pumping mode, the delivery pump requires approximately 75% of the total electrical energy of the truck-mounted concrete pump.The remaining 25% of the electrical energy can be drawn from the energy storage system without the risk of the energy storage system being discharged too much and the remaining energy no longer being sufficient for the return trip from the construction site.

[0007] Advantageous embodiments and further developments of the invention are set forth in the dependent claims. It should be noted that the features listed individually in the claims can also be combined with one another in any technologically meaningful way, thus revealing further embodiments of the invention.

[0008] According to an advantageous embodiment of the invention, the truck-mounted concrete pump is further equipped to charge the energy storage device with electrical energy via the mains connection in a charging mode different from the pumping mode, while the delivery pump is not driven by the electric pump drive or while the delivery pump is driven by the electric pump drive with a reduced power compared to the pumping mode.

[0009] During the pump's downtime, and when the pump does not require the maximum electrical energy available from the grid (e.g., at reduced output), the grid connection is conveniently used to charge the energy storage device. This allows the energy storage device to be charged via grid operation during periods when little or no concrete is being pumped on the construction site and the grid connection can provide sufficient energy for charging. A particularly preferred embodiment provides that the truck-mounted concrete pump is further equipped to supply the auxiliary electric drive with electrical energy via the grid connection during charging mode.By supplying the auxiliary electric drives via the mains connection, it can be ensured in charging mode that, for example, the agitator of the truck-mounted concrete pump continues to run when the main pump is paused or operating at reduced power. The diverter valve can also be adjusted during pump pauses if the auxiliary drive for the diverter valve's storage charging pump is powered by mains electricity in charging mode. Furthermore, in charging mode, the adjustment mechanism of the truck-mounted concrete pump, used to adjust a frame support or a placing boom, can also be driven by an auxiliary electric drive, which is then powered by mains electricity.

[0010] A particularly advantageous embodiment of the invention relates to the fact that the energy storage device comprises a rechargeable battery which is charged via a fuel cell of the energy storage device by reacting hydrogen from a hydrogen tank of the truck-mounted concrete pump with oxygen to produce water, thereby generating electrical energy. With the inventive power supply of the pump drive via the mains connection and an auxiliary drive via the energy storage device in pumping mode, hydrogen-powered truck-mounted concrete pumps are also readily feasible.

[0011] A particularly advantageous embodiment of the invention provides that the control system of the truck-mounted concrete pump is configured to switch between pumping mode and charging mode. This automatic switching between pumping and charging modes allows for optimal utilization of the available electrical energy from the mains supply and energy storage system. The control system can be designed for variable control of the electrical energy supply to consumers (electric pump drive, electric auxiliary drives) from the mains supply and / or the energy storage system, i.e., control dependent on the respective operating mode. A further advantageous embodiment of the invention provides that the truck-mounted concrete pump is configured to supply the electric pump drive with electrical energy from the energy storage system in an emergency operating mode different from the pumping mode.In the event of a power outage or a grid failure, the truck-mounted concrete pump can easily continue operating in an emergency mode. For smaller construction sites, this emergency mode is sufficient to complete the work.

[0012] A particularly advantageous embodiment provides that the truck-mounted concrete pump is further equipped to supply the auxiliary electric drive with electrical energy from the energy storage system in emergency operating mode. This allows work on the construction site to be completed with the truck-mounted concrete pump even if the mains connection is unavailable or there is a power outage in the public grid.

[0013] An advantageous design provides for the electric auxiliary drive to include an electric power take-off (E-PTO). Such an electric power take-off serves to drive at least one additional working unit of the truck-mounted concrete pump. Suppliers of electric trucks offer such E-PTOs, i.e., electric motors for the truck-mounted concrete pump. The E-PTOs are supplied with electrical energy by the energy storage system and are matched to the energy storage system and the rest of the truck. The power output of these power take-offs is insufficient to drive a truck-mounted concrete pump, especially not the pump drive of the delivery pump, which is typically a two-cylinder piston pump.

[0014] According to a preferred embodiment of the invention, the additional working device is an agitator of the truck-mounted concrete pump, a storage charging pump for a pipe diverter of the delivery pump, or an adjustment device of the truck-mounted concrete pump for adjusting a frame support of the truck-mounted concrete pump or for adjusting a placing boom of the truck-mounted concrete pump. The respective drive of these working devices in pumping mode by electrical energy from the energy storage device relieves the mains connection in pumping mode, which provides the electrical energy for driving the pump drive to operate the delivery pump.

[0015] A particularly advantageous embodiment provides that several additional working devices are driven either by a single electric auxiliary drive or by several electric auxiliary drives, or that each additional working device is driven by its own electric auxiliary drive. The optimal distribution of the working devices across the auxiliary drives ensures efficient operation of the truck-mounted concrete pump and low load on the energy storage system during pumping operation.

[0016] Further features, details, and advantages of the invention will become apparent from the following description and the drawings, which show exemplary embodiments of the invention. Corresponding objects or elements are provided with the same reference numerals in all figures. The figures show:

[0017] Figure 1 shows the truck-mounted concrete pump according to the invention in pumping mode.

[0018] Figure 2 shows the truck-mounted concrete pump according to the invention in charging mode.

[0019] Figure 3 shows another truck-mounted concrete pump according to the invention with an additional battery in pumping mode.

[0020] Figure 4 shows a further truck-mounted concrete pump according to the invention with an alternative arrangement of the auxiliary drives.

[0021] Figure 5 shows a further truck-mounted concrete pump according to the invention with cooler, and

[0022] Figure 6 shows a further truck-mounted concrete pump according to the invention with a further alternative arrangement of the auxiliary drives,

[0023] Figure 7 shows a further truck-mounted concrete pump according to the invention with a charging port; Figure 8 shows an alternative truck-mounted concrete pump according to the invention compared to Figure 1.

[0024] Figure 9 to Figure 2 alternative truck-mounted concrete pump according to the invention,

[0025] Figure 10 to Figure 3 alternative truck-mounted concrete pump according to the invention,

[0026] Figure 11 to Figure 4 alternative truck-mounted concrete pump according to the invention,

[0027] Figure 12 to Figure 5 alternative truck-mounted concrete pump according to the invention with cooler, and

[0028] Figure 13 shows a further alternative truck-mounted concrete pump according to the invention with a further alternative arrangement of the auxiliary drives, and

[0029] Figure 14 shows another truck-mounted concrete pump according to the invention with charging port.

[0030] Figure 1, designated by reference numeral 1, schematically depicts a truck-mounted concrete pump according to the invention. The truck-mounted concrete pump 1 has at least one electric drive 2 for accessing construction sites via public roads. For this purpose, an energy storage device 3 is provided, which supplies the drive 2 with electrical energy during travel in driving mode.

[0031] For conveying the concrete, the truck-mounted concrete pump 1 has a feed pump 4, which is typically a hydraulically driven two-cylinder piston pump. The truck-mounted concrete pump 1 has an electric pump drive 5 that drives the feed pump 4. For this purpose, the pump drive 5 comprises at least one electric motor and at least one hydraulic pump driven by it, which in turn hydraulically drives the feed pump 4. Furthermore, the truck-mounted concrete pump 1 has additional working equipment 6, such as an agitator 10 of the truck-mounted concrete pump 1 or a storage charging pump for a pipe diverter 11 of the feed pump 4. This working equipment is driven by an auxiliary electric drive 7, separate from the electric pump drive 5.The adjustment device 12 of the truck-mounted concrete pump 1 for adjusting a frame support 13 of the truck-mounted concrete pump 1 or for adjusting a placing boom 14 of the truck-mounted concrete pump 1 is driven by the pump drive 5 in the exemplary embodiment. The truck-mounted concrete pump 1 is configured to draw electrical energy E via at least one mains connection 8 of the truck-mounted concrete pump 1 in a pumping operating mode. In this pumping operating mode, the electrical energy E is then used via the mains connection 8 to supply the electric pump drive 5. Furthermore, in the pumping operating mode, the electric auxiliary drive 7 is supplied at least partially or completely with electrical energy E from the energy storage device 3.This pumping mode can be maintained for approximately ten hours, for example, assuming that a total of 200 kWh is available from the energy storage unit 3 for the E-PTO 9 and that the auxiliary drive(s) 7 consume approximately 20 kW of power per hour. This enables a delivery rate and flow rate of the pump 4 comparable to diesel-powered truck-mounted concrete pumps and allows for a particularly simple design of the electrical equipment for the power supply. The grid connection 8 is preferably implemented via an AC / DC converter 15, which can, for example, consist of an on-board charger with one or more chargers connected in parallel.The AC / DC converter could also be called an inverter or converter and is connected, for example, to a DC / AC inverter 16, which is connected to the pump drive and with which the electrical power output to the pump drive can be regulated. The AC / DC converter 15 converts the alternating current from the mains connection 8 into direct current, and the DC / AC inverter 16 converts the direct current into alternating current for driving the pump drive 5. This also allows for a charging mode and an emergency operating mode. The electrical configuration would, of course, be different if, for example, a direct current power supply were available on the construction site, such as those used for charging electric vehicles, or if the electric drive 5 were equipped with a DC motor. Furthermore, it is conceivable that several mains connections 8 could be used in parallel to supply the pump drive 5.For example, two existing 32-amp connections can be used in parallel for the pump drive if no more powerful power connection is available on the construction site.

[0032] Figure 2 schematically shows the truck-mounted concrete pump 1 according to Figure 1 in charging mode. In the charging mode, which differs from the pumping mode, the energy storage unit 3 can be charged with electrical energy E via the mains connection 8, while the delivery pump 4 is not driven or is driven with reduced power by the electric pump drive 5. The mains connection 8 is therefore used to charge the energy storage unit 3 during breaks in pumping or during phases of reduced concrete delivery by the delivery pump 4. Thus, the energy storage unit 3 can be charged via the mains connection 8 during phases in which no or only a small amount of concrete is being delivered by the delivery pump 4 on the construction site and the mains connection 8 can provide sufficient energy to charge the energy storage unit 3. Furthermore, the electric auxiliary drive 7 of the truck-mounted concrete pump 1 can be supplied with power via the mains connection 8 in charging mode.By supplying the electric auxiliary drive 7 via the mains connection 8, the continued operation of the agitator 10 of the truck-mounted concrete pump 1 can be ensured, for example, when the delivery pump 4 is not running, during charging mode. If the auxiliary drive 7 for the storage charging pump of the pipe diverter 11 is supplied with electrical energy from the mains connection 8 during charging mode, the pipe diverter can also be adjusted during pauses in the delivery pump 4's operation. A connection 20 provides electrical energy transmission to the electric auxiliary drive 7 from the mains connection 8 during charging mode. Advantageously, the truck-mounted concrete pump 1's control system automatically switches between pumping mode and charging mode as needed, switching the electrical energy flows accordingly.The control system of the truck-mounted concrete pump 1 can, for example, switch to charging mode even when the delivery pump 4 is operating at reduced power and electrical energy from the site power supply is available to recharge the energy storage unit 3 without overloading the power supply. The truck-mounted concrete pump 1 is also equipped with an emergency mode, separate from pumping mode, to supply the electric pump drive 5 with electrical energy from the energy storage unit 3. In this emergency mode, an auxiliary electric drive 7 can also be supplied with electrical energy from the energy storage unit 3. This allows work on the construction site with the truck-mounted concrete pump 1 to continue even if the mains power supply 8 is unavailable or there is a power outage. For smaller construction sites, this emergency mode is sufficient to complete the work.In emergency operating mode, the connection 20 between the energy storage unit 3 and the pump drive 5 can be used to transmit electrical energy. To control the transmission of electrical energy via the connection 20, the truck-mounted concrete pump 1 preferably has a vehicle controller 17, which can also be referred to as a power distribution unit / electrical power control unit or similar. The vehicle controller 17, which can be located on the truck chassis or the concrete pump superstructure, regulates the flow of electrical power between the energy storage unit 3, the auxiliary drive(s) 7, and the mains power supply.The vehicle controller 17 can, for example, also be connected to another output of the AC-DC converter 15, not shown in the figures, for the transmission of control signals and / or electrical power and control the power output of the AC-DC converter 15 towards the energy storage device 3 and the auxiliary drives 7.

[0033] Figure 3 schematically shows another truck-mounted concrete pump 1 according to the invention, which largely corresponds to the truck-mounted concrete pump 1 according to Figures 1 and 2. One difference is that an auxiliary battery 18 is provided. The auxiliary battery 18 of the truck-mounted concrete pump 1 enables short-term pumping without a mains connection 8 (e.g., a maximum of 2 hours) and / or higher peak power for the pump drive 5, because the auxiliary battery 18 is used as a buffer for the mains power supply. If the only requirement is buffering for short-term peak power, a supercapacitor can also be used as an auxiliary battery 18 in addition to or as an alternative to a battery. In particular, during the initial pumping phase with the feed pump 4, i.e., when the feed pump 4 begins pumping, which requires a particularly high drive power, the auxiliary battery 18 can compensate for power peaks.For the pump drive 5, an auxiliary battery 18 with a capacity of at least 100 kWh should preferably be available to ensure at least short-term operation of the pump 5 without an external power supply. The auxiliary drive 7 can then be powered by the energy storage unit 3 in pumping mode. This allows small construction sites to operate autonomously. A 32 A mains connection 8 would also be sufficient for extended operating time of the truck-mounted concrete pump 1. Infrastructure with 63 A mains connections 8 is currently very rare on construction sites.

[0034] It is also possible that instead of an additional battery 18, electrical energy from the energy storage unit 3 is used in addition to the energy from the construction site power connection for the pump drive 5 during the pumping process, whereby it should be noted that the electrical output power of the E-PTO, which is limited to approximately 30 - 80 kW, for example, should not be exceeded.

[0035] Figure 4 schematically shows another truck-mounted concrete pump 1 according to the invention. In contrast to the embodiments according to Figures 1 to 3, an alternative arrangement of the auxiliary drives 7 is used here. Instead of driving several additional working devices 6 with a single electric auxiliary drive 7, as in Figures 1 to 3, each additional working device 6 is driven by its own electric auxiliary drive 7. The electric auxiliary drives 7 are advantageously designed as E-PTOs. Such an electric power take-off serves to drive at least one additional working device 6 on the truck-mounted concrete pump 1. The E-PTOs are supplied with electrical energy from the energy storage device 3.An E-PTO can, for example, be an electrical power connection provided by the truck manufacturer to supply electrical drive energy to superstructures mounted on the truck chassis. However, the drive energy available from the energy storage unit 3 alone is generally insufficient for the continuous operation of the fuel pump 4. An E-PTO can also be designed as a complete drive unit with an electric motor / auxiliary drive 7 and a power controller 9. Manufacturers of electric trucks offer various E-PTO concepts, depending, for example, on the extent to which they allow the superstructure manufacturer to modify the truck's drive system.

[0036] Figure 5 shows an additional electric drive 7 for a cooler 19, which is also supplied via the mains connection 8 in pump operation mode. Additionally, in the embodiment shown in Figure 5, the agitator 10 is driven directly by an electric motor 7 and not via a hydraulic system, which typically has a rather low efficiency.

[0037] Figure 6 schematically shows another truck-mounted concrete pump 1 according to the invention. Here, the adjustment device 12 of the truck-mounted concrete pump 1, used to adjust the frame support 13 of the truck-mounted concrete pump 1 or to adjust a placing boom 14 of the truck-mounted concrete pump 1, is also driven by its own auxiliary electric drive 7. In pumping mode, the auxiliary drive 7 is supplied with electrical energy from the energy storage device 3. Furthermore, in charging mode, the adjustment device 12 of the truck-mounted concrete pump 1, used to adjust the frame support 13 of the truck-mounted concrete pump 1 or to adjust a placing boom 14 of the truck-mounted concrete pump 1, can also be driven by the auxiliary electric drive 7, which is then supplied with electrical energy from the mains connection 8.

[0038] Figure 7 schematically depicts another truck-mounted concrete pump 1 according to the invention, in which the energy storage device 3 is charged in charging mode via a charging current connection 21 of the energy storage device 3. In the illustrations of Figures 1 to 6, it was assumed that charging the energy storage device 3 from the mains connection 8 is practically possible from the E-PTO output to the energy storage device 3. However, this is very likely not the case for every truck manufacturer. In this case, particularly if the AC / DC converter 15 is designed similarly to a charger, i.e., for example, as an on-board charger, a power line, for example, the connecting line 20, can be connected to a charging plug 21 during a pumping break. This plug can then be connected to the charging current connection 22 of the truck chassis to recharge the energy storage device 3.The charging port 22 is the standard charging port found on every electric car or truck. While the energy storage unit 3 is being recharged in charging mode, the agitator 10 can also be driven from the mains connection 8, for example. This is because, depending on the truck manufacturer's electric drive concept, it is possible that no electrical energy is available for the E-PTO drive while the energy storage unit 3 is being charged. Charging mode typically occurs, for example, during a pause in the delivery of fresh concrete, such as while waiting for the next concrete mixer truck. It is also conceivable that, during pumping operation, the charging plug 21 remains permanently connected to the charging port 22, and a control system ensures that no energy flows from the charging plug 21 to the energy storage unit 3 during pumping operation.The electrical connection from the AC / DC converter 15 to the energy storage device 3 can also be permanently installed on the truck-mounted concrete pump 1 via suitable wiring, but is only automatically activated by a control unit during pumping pauses. The AC / DC converter 15 can, for example, also consist of several chargers arranged in parallel, which together supply the electric pump drive 5 with electrical energy in pumping mode and perform different tasks in charging mode. For example, with four chargers 15 connected in parallel, three chargers could be used to charge the energy storage device 3 in charging mode, and one charger could supply the electric auxiliary drive 7 with electrical energy via the mains connection 8.

[0039] Figures 8 to 14 show, in particular, an alternative configuration of the electrical power supply for the auxiliary drive(s) 7 from the energy storage device 3 of the truck chassis for the drive system 2. The basic configuration of the pump drive 5, the working devices 6, and the auxiliary drive(s) 7 corresponds to the configuration of the embodiments shown in Figures 1 to 7; that is, the configuration of Figure 8 corresponds to Figure 1, the configuration of Figure 9 corresponds to Figure 2, and so on.

[0040] The alternative configuration of the electrical power supply for the auxiliary drive 7 from the energy storage device 3 of the truck chassis for the drive system 2 is explained below with reference to Figure 8. In these alternative embodiments, the vehicle controller 17 is connected to the energy storage device 3 and the drive system 3 and regulates or controls the electric drive system 2. An electrical supply line leads from the vehicle controller 17 to the E-PTO 9, which, in the embodiments shown in Figures 8 to 14, serves as an electrical interface to the concrete pump assembly. The E-PTO 9 provides the assembly with a typically limited electrical power, which is limited, for example, by the vehicle controller 17 or by a fuse in the E-PTO 9. The electrical power available from the E-PTO 9 is, for example, limited to 20 kW.This electrical power is sufficient to drive one or more auxiliary drives 7 of the truck-mounted concrete pump 1 for a sufficient period of time, but is not sufficient to drive the pump drive 5 adequately. An electrical connection leads from the E-PTO 9 to a DC / AC converter 16, which controls the auxiliary drive 7, i.e., the electric motor M2, which in turn, in this exemplary illustration, drives the hydraulic pumps for the drive of the agitator 10 and the storage charging pump for the pipe diverter 11.

[0041] The drive system shown in Figure 9 is essentially the same as the electrical system of the truck with the vehicle controller 17, the energy storage device 3, and the drive unit 2 shown in Figure 8. Unlike Figure 8, the circuit in Figure 9 includes an electrical connection 20 from the power branch supplied via the mains connection 8 to the power branch supplied by the energy storage device 3. This electrical connection 20 runs from the output of the AC / DC converter 15 to an inverter assembly 23, which is connected to the E-PTO 9 on its input side and to the auxiliary drive 7 on its output side. The inverter assembly 23 includes a DC / DC converter, for example, a four-quadrant converter, which specifically adapts the DC voltage from the AC / DC converter 15 to the DC voltage of the E-PTO 9 or the energy storage device 3.In particular, the DC voltage applied to the connecting line 20 can fluctuate considerably during operation of the pump drive 5, which is why the inverter assembly 23 may have to compensate for significant voltage differences. Furthermore, the inverter assembly 23 includes a DC / AC inverter 16 for controlling the auxiliary drive 7. For example, if the energy storage device 3 cannot provide sufficient electrical power for the auxiliary drive 7, electrical power for the auxiliary drive 7 can be drawn from the grid connection 8, which is supplied via the connecting line 20 and the inverter assembly 23. In the event of an unexpected failure of the electrical power supply to the E-PTO 9, the inverter assembly 23 can also ensure the electrical supply of the auxiliary drive 7 via the grid connection 8 on-the-fly.The electrical power then used for the auxiliary drive 7 from the mains connection 8 reduces the electrical power available for the pump drive 5 accordingly.

[0042] If the E-PTO 9 allows an electrical energy flow towards the vehicle controller 17, or if the vehicle controller 17 accepts an energy flow from the E-PTO 9 in its direction, the electrical energy from the mains connection 8 can be used to recharge the energy storage 3 of the truck chassis, especially during pumping breaks.

[0043] The embodiment shown in Figure 10 corresponds in principle to the embodiment shown in Figure 9, with the difference that a supercapacitor or an additional battery 8 is coupled to the output of the AC / DC converter 15, which is intended in particular for compensating for power peaks of the pump drive 5.

[0044] In the embodiments shown in Figures 11, 12 and 13, the difference to the embodiments shown in Figures 8, 9 and 10 is in particular that the inverter arrangement 23 has two or three DC / AC converters 15 for controlling two or three auxiliary drives 7.

[0045] The embodiment shown in Figure 14 again depicts a setup with a connecting line 20 from the AC / DC converter 15 to the inverter arrangement 23, which in this embodiment includes, in addition to a DC / DC converter for DC voltage adaptation, a DC / AC converter 15 for controlling an auxiliary drive 7. In this embodiment, it is not possible to return electrical power from the E-PTO 9 to the energy storage device 3 of the truck chassis. To nevertheless enable the energy storage device 3 to be charged, for example, during pumping breaks, via the mains connection 8, a power line runs from the connecting line 20 to a charging plug 21, which can be connected to the charging current connection 22 of the truck chassis. In the embodiment shown in Figure 14, a power line runs from the charging current connection 22 to the vehicle controller 17, which controls the charging process of the energy storage device 3.Furthermore, the charging options for the energy storage device 3 are the same as those already described in connection with Figure 7.

[0046] The charging option described in connection with Figure 14 using a charging plug 21 can of course also be readily transferred to the embodiments shown in Figures 8 to 13.

[0047] The inverter arrangement 23, shown as an example module in Figures 9 to 14, can also consist of separate units, i.e., a separate DC / DC converter and associated separate DC / AC converters 15. If DC motors are used as auxiliary drives 7, corresponding DC / DC converters would need to be provided. Finally, it should be noted that all embodiments shown in Figures 1 to 14 can, of course, be combined with one another in a technologically sensible manner without deviating from the basic idea of ​​the invention. For example, the charging function shown in Figure 7 via the charging current connection 22 can readily be applied to the embodiments according to Figures 1 to 6. Likewise, the additional battery 18 can also be used in the embodiments shown in Figures 3 and 10, as shown in Figures 1, 2, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14.

[0048] - Reference symbol list -

[0049] List of references

[0050] 1 truck-mounted concrete pump

[0051] 2 Drive system 3 Energy storage

[0052] 4. Pump

[0053] 5 Pump drive

[0054] 6 Work setup

[0055] 7 Additional drive 8 Mains connection

[0056] 9 E-PTO / Power regulator

[0057] 10 Agitator

[0058] 11 Storage charging pump for a pipe diverter

[0059] 12 Adjustment device 13 Frame support

[0060] 14 distribution mast 15 AC / DC converter

[0061] 16 inverters (DC / AC converters)

[0062] 17 vehicle controllers

[0063] 18 Supercapacitor / Auxiliary battery 19 Radiator

[0064] 20 connecting line

[0065] 21 charging plugs

[0066] 22 Charging current connection

[0067] 23 Inverter Arrangement E Energy

[0068] - Patent claims -

Claims

Patent claims 1. Truck-mounted concrete pump (1) with at least one electric drive (2), at least one energy storage device (3) configured to supply the drive (2) for driving the truck-mounted concrete pump (1) with electrical energy, at least one delivery pump (4) for conveying concrete, at least one electric pump drive (5) configured to drive the delivery pump (4), at least one additional working device (6), at least one additional electric drive (7) different from the electric pump drive (5) configured to drive the additional working device (6), wherein the truck-mounted concrete pump (1) is configured to draw electrical energy (E) in a pumping mode via at least one mains connection (8) of the truck-mounted concrete pump (1) in order to supply the electric pump drive (5), characterized in that the truck-mounted concrete pump (1) is further configured toin pumping mode to supply the electric auxiliary drive (7) at least partially or completely with electrical energy (E) from the energy storage device (3).

2. Truck-mounted concrete pump (1) according to claim 1, characterized in that the truck-mounted concrete pump (1) is further configured to charge the energy storage device (3) with electrical energy (E) via the mains connection (8) in a charging mode different from the pumping mode, while the delivery pump (4) is not powered by the electric pump drive (5) is driven or while the feed pump (5) is driven by the electric pump drive (5) with reduced power compared to the pump operating mode.

3. Truck-mounted concrete pump (1 ) according to claim 2, characterized in that the truck-mounted concrete pump (1 ) is further equipped to supply the electric auxiliary drive (7) with electrical energy via the mains connection (8) in the charging mode.

4. Truck-mounted concrete pump (1 ) according to one of claims 1 to 3, characterized in that the energy storage device (3) comprises a rechargeable accumulator which is charged via a fuel cell of the energy storage device (3) by reacting hydrogen from a hydrogen tank of the truck-mounted concrete pump (1 ) with oxygen in the fuel cell to produce electrical energy in water.

5. Truck-mounted concrete pump (1 ) according to one of the preceding claims, characterized in that a control system of the truck-mounted concrete pump (1 ) is configured to switch between the pumping mode and the charging mode.

6. Truck-mounted concrete pump (1 ) according to one of the preceding claims, characterized in that the truck-mounted concrete pump (1 ) is further equipped to supply the electric pump drive (5) with electrical energy from the energy storage device (3) in an emergency operating mode different from the pumping operating mode.

7. Truck-mounted concrete pump (1 ) according to claim 6, characterized in that the truck-mounted concrete pump (1 ) is further equipped to also supply the electric auxiliary drive (7) with electrical energy (E) from the energy storage device (3) in the emergency operating mode.

8. Truck-mounted concrete pump (1 ) according to one of the preceding claims, characterized in that the electric auxiliary drive (7) comprises an E-PTO (9).

9. Truck-mounted concrete pump (1) according to one of the preceding claims, characterized in that the additional working device (6) is a agitator (10) of the truck-mounted concrete pump (1 ) or a storage charging pump for a pipe diverter (11 ) of the delivery pump (4) or an adjustment device (12) of the truck-mounted concrete pump (1 ) for adjusting a frame support (13) of the truck-mounted concrete pump (1 ) or adjusting a placing boom (14) of the truck-mounted concrete pump (1 ).

10. Truck-mounted concrete pump (1 ) according to one of the preceding claims, characterized in that several additional working devices (6) are driven either by a single electric auxiliary drive (7) or by several electric auxiliary drives (7) or that each additional working device (6) is driven by its own electric auxiliary drive (7). - Summary -

Images